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Full vulnerability report · 2023
CVE-2023-36617High confidence

A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby

n/a · n/a

5.3MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivejrubyUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical record ↗Source updated 4 Sept 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SSA-806742 · CSAF 2.0 · revision 1 · interimSiemens ProductCERTSSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4
11 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SCALANCE XCH328 (6GK5328-4TS01-2EC2)
  • SCALANCE XCM324 (6GK5324-8TS01-2AC2)
  • SCALANCE XCM328 (6GK5328-4TS01-2AC2)
  • SCALANCE XCM332 (6GK5332-0GA01-2AC2)
  • SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3)
  • SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3)
  • SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3)
  • SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3)
  • SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3)
  • SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3)
  • SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3)
Summary
A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with rfc2396_parser.rb and rfc3986_parser.rb. NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version.
Remediation
Update to V2.4 or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-1827

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with rfc2396_parser.rb and rfc3986_parser.rb. NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version.

What

A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with rfc2396_parser.rb and rfc3986_parser.rb. NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version.

Why

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with rfc2396_parser.rb and rfc3986_parser.rb. NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version.

Why

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Inefficient Regular Expression Complexity → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-1333 ↗

CWE-1333: Inefficient Regular Expression Complexity. The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.ALowAvailability impact: A successful attack can cause a limited loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-1333
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2023-1590Ruby: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Ruby ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0622Multiples vulnérabilités dans les produits VMware

ERecord?id=CVE-2023-29406 Référence CVE CVE-2023-29409 https://www.cve.org/CVERecord?id=CVE-2023-29409 Référence CVE CVE-2023-2975 https://www.cve.org/CVERecord?id=CVE-2023-2975 Référence CVE CVE-2023-2976 https://www.cve.org/CVERecord?id=CVE-2023-2976 Référence CVE CVE-2023-30551 https://www.cve.org/CVERecord?id=CVE-2023-30551 Référence CVE CVE-2023-33199 https://www.cve.org/CVERecord?id=CVE-2023-33199 Référence CVE CVE-2023-33201 https://www.cve.org/CVERecord?id=CVE-2023-33201 Référence CVE CVE-2023-33202 https://www.cve.org/CVERecord?id=CVE-2023-33202 Référence CVE CVE-2023-3446 https://www.cve.org/CVERecord?id=CVE-2023-3446 Référence CVE CVE-2023-36617 https://www.cve.org/CVERecord?id=CVE-2023-36617 Référence CVE CVE-2023-36632 https://www.cve.org/CVERecord?id=CVE-2023-36632 Référence CVE CVE-2023-3817 https://www.cve.org/CVERecord?id=CVE-2023-3817 Référence CVE CVE-2023-39318 https://www.cve.org/CVERecord?id=CVE-2023-39318 Référence CVE CVE-2023-39319 https://www.cve.org/CVERecord?id=CVE-2023-39319 Référence CVE CVE-2023-39323 https://www.cve.org/CVERecord?id=CVE-2023-39323 Référence CVE CVE-2023-39325 https://www.cve.org/CVERecord?id=CVE-2023-39325 Référence CVE CVE-2023-39326 https://www.cve.org/CVERecord?id=CVE-2023-39326 Référence CVE CVE-2023-3978 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0119Multiples vulnérabilités dans les produits Siemens

ord?id=CVE-2023-35001 Référence CVE CVE-2023-35788 https://www.cve.org/CVERecord?id=CVE-2023-35788 Référence CVE CVE-2023-35789 https://www.cve.org/CVERecord?id=CVE-2023-35789 Référence CVE CVE-2023-35823 https://www.cve.org/CVERecord?id=CVE-2023-35823 Référence CVE CVE-2023-35824 https://www.cve.org/CVERecord?id=CVE-2023-35824 Référence CVE CVE-2023-35828 https://www.cve.org/CVERecord?id=CVE-2023-35828 Référence CVE CVE-2023-35945 https://www.cve.org/CVERecord?id=CVE-2023-35945 Référence CVE CVE-2023-36054 https://www.cve.org/CVERecord?id=CVE-2023-36054 Référence CVE CVE-2023-3611 https://www.cve.org/CVERecord?id=CVE-2023-3611 Référence CVE CVE-2023-36617 https://www.cve.org/CVERecord?id=CVE-2023-36617 Référence CVE CVE-2023-36664 https://www.cve.org/CVERecord?id=CVE-2023-36664 Référence CVE CVE-2023-3776 https://www.cve.org/CVERecord?id=CVE-2023-3776 Référence CVE CVE-2023-37920 https://www.cve.org/CVERecord?id=CVE-2023-37920 Référence CVE CVE-2023-38039 https://www.cve.org/CVERecord?id=CVE-2023-38039 Référence CVE CVE-2023-3817 https://www.cve.org/CVERecord?id=CVE-2023-3817 Référence CVE CVE-2023-38199 https://www.cve.org/CVERecord?id=CVE-2023-38199 Référence CVE CVE-2023-38545 https://www.cve.org/CVERecord?id=CVE-2023-38545 Référence CVE CVE-2023-38546 https://www.cve.org/CVERecord?id=CVE-

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
SCALANCE XCH328 (6GK5328-4TS01-2EC2); SCALANCE XCM324 (6GK5324-8TS01-2AC2); SCALANCE XCM328 (6GK5328-4TS01-2AC2); SCALANCE XCM332 (6GK5332-0GA01-2AC2); SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3); SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3); SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3); SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3); SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3); SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3); SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3)
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
Update to V2.4 or later version
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04

Evidence and provenance

Published 29 Jun 2023 · Last source change 4 Nov 2025, 17:12 UTC · CWE-1333 · Inefficient Regular Expression Complexity

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-1827
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Mitigation reference recorded
ENISA EUVD · EUVD-2023-1827↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-36617 · cve.blacktree.nl